Calculators.
Smoothey, Marion, 1943-
Calculators. by Marion Smoothey ; illustrated by Ann Baum. - New York : Marshall Cavendish, 1995. - 64 pages : color illustrations ; 26 cm. - Let's investigate . - Smoothey, Marion, 1943- Let's investigate. .
Includes index.
1854357778 1854357735
94019452
Calculators.
QA 75 / .Sm79 1995
Calculators. by Marion Smoothey ; illustrated by Ann Baum. - New York : Marshall Cavendish, 1995. - 64 pages : color illustrations ; 26 cm. - Let's investigate . - Smoothey, Marion, 1943- Let's investigate. .
Includes index.
1854357778 1854357735
94019452
Calculators.
QA 75 / .Sm79 1995